[rules-users] Odd rules execution for expired events

[sopel39]

Not only that. It can also cause NPE to be thrown. That would happen if there
is such a rule:

rule "Update Recording"
  when
    $m : Motion()
    $r : Recording()
  then
    System.err.println("Recording: " + $r);
    retract($r);
end

then this rule may be executed multiple times and $r could be NULL (since
there should be only one instance of a Recording at most). I would call it a
bug.


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